title: Immunological maturation of bursal lymphoid cells in young chickens treated with bursa of Fabricius extract.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D002003:Brucella abortus / Q000276:immunology; D002060:Bursa of Fabricius / Q000276:immunology* / Q000637:transplantation; D002645:Chickens / Q000276:immunology*; D014020:Tissue Extracts / Q000276:immunology*; D014185:Transplantation, Isogeneic
chemical_list: D014020:Tissue Extracts